The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2007
Filed:
May. 08, 2002
Hirokazu Kanekiyo, Kyoto, JP;
Toshio Miyoshi, Ibaraki, JP;
Satoshi Hirosawa, Otsu, JP;
Neomax Co., Ltd., Osaka, JP;
Abstract
An iron-based rare earth alloy nanocomposite magnet has a composition represented by (FeT)QRTi, where T is Co and/or Ni, Q is B and/or C and R is rare earth element(s) including substantially no La or Ce. x, y, z and m satisfy 10 at %<x≦17 at %, 7 at %≦y<10 at %, 0.5 at %≦z≦6 at % and 0≦m≦0.5, respectively. The magnet includes crystal grains of an RTQ type compound having an average grain size of 20 nm to 200 nm and a ferromagnetic iron-based boride that exists in a grain boundary between the crystal grains of the RTQ type compound. The boride is dispersed in, or present in the form of a film over, the grain boundary to cover at least partially the surface of the crystal grains of the RTQ type compound.